MP3 Database for removable media. Based on Eclipselink and can use a lot of databases (e.g. MySQL, PostgreSQL...) and includes an integrated database. Support for plugins for other media. Runs on Windows, Linux and MacOS X. Needs Java 6
JMP3Cat is a MP3 Cataloger that reads MP3 CDs and inputs the data into a database for sorting and listening. It also prints Jewel Case sleeves and removes duplicate files off the hard drive without the need to locate them on the hard drive.
MP3Wharf is a an mp3 file management system. It is basically a Java database frontend for inserting, viewing and updating inforamtion on your collection of mp3 files. It offers various tools to organize this data.